0445120126
BOSCH 0445120126 Common Rail Injector for Kobelco SK135 SK140 Mitsubishi D04FR 3.3L
32G61-00010, 32G6100010, VA32G6100010F00RJ02266DLLA135P17471600 barProduct Overview
The Bosch 0445120126 is an industrial-duty CRIN2-16 common rail diesel fuel injector engineered for heavy earthmoving machinery powered by the Mitsubishi D04FR and D04FR-TAA 3.3L four-cylinder turbocharged intercooled diesel engines (factory platform code YN33CRD, rated from 69 kW / 92 HP to 74 kW / 99 HP). Widely deployed in Kobelco SK130-8, SK135SR-2, and SK140SRLC hydraulic excavators as well as Kato HD512IV machines meeting Tier 3 and Stage IIIA emissions, this injector operates at rail pressures up to 1600 bar. Internal hydraulic components include precision hole-type nozzle 0433172069 (stamped DLLA135P1747), control valve set F00RJ02266, and 24V solenoid actuator F00VC30301. Workshop failure symptoms under harsh excavation duty cycles include excessive backleakage, hard starting when hot, black smoke under hydraulic load, engine surging, and rail pressure fault codes.
CRITICAL INSTALLATION NOTICE: Thoroughly clean and ream the injector seat in the cylinder head prior to installation. Always fit a brand-new copper sealing washer of correct thickness (standard 1.5mm) and lubricate the viton body O-ring with clean engine oil. Torque the injector hold-down clamp bolt to 25-30 N·m in a smooth single motion to ensure gas-tight combustion sealing and prevent blow-by carbon buildup.
Vehicle & Engine Fitment
| Vehicle | Engine | Years |
|---|---|---|
| Kobelco SK135SR-2 Hydraulic Excavator | Mitsubishi D04FR (3.3L) | 2007-2015 |
| Kobelco SK140SR-8 / SK140SRLC Crawler Excavator | Mitsubishi D04FR (3.3L) | 2008-2016 |
| Kobelco SK130-8 Medium Earthmoving Excavator | Mitsubishi D04FR (3.3L) | 2008-2015 |
| Kato HD512IV Hydraulic Excavator | Mitsubishi D04FR (3.3L) | 2008-2015 |
Technical Specifications
| Specification | Value |
|---|---|
| Injection System | Bosch CRIN2-16 |
| Operating Rail PressureCore Spec | |
| Nozzle Part NumberCore Spec | |
| Nozzle CodeCore Spec | |
| Control Valve AssemblyCore Spec | 🔗 Shared Valve (2 assemblies):0445120289 |
| Magnet Assembly | F00VC30301 |
| Seal Ring Kit | F00RJ02176 |
| Injector Hold-Down Bolt Torque | 25-30 N·m📐 Torque & Angle Wizard → |
| Fuel Line Nut Torque | 30-35 N·m |
| IMA Coding Required | No (Non-IMA hydraulic calibration unit) |
| Factory Warranty | 12 Months |
| Operating PressureCore Spec |
Diagnostic Trouble Codes & Fault Protocols
Common diagnostic trouble codes (DTCs) triggered when this common rail injector experiences wear, circuit faults, or calibration drift:
Fuel Rail / System Pressure Too Low
Excessive internal backleak from worn control valve seats drops common rail pressure below target under engine load.
Injector Circuit Malfunction / Open Circuit
Solenoid coil resistance drift (0.2-0.5 Ω) or piezo stack degradation triggers driver stage shutdown on affected cylinders.
Cylinder Misfire & Balancing Deviation
Carbon-clogged nozzle spray holes or missing IMA calibration causes uneven cylinder contribution. Recode ECM and verify washer seating.
Fuel Rail / System Pressure Too High
Spill line backpressure or stuck metering valve prevents rail depressurization, creating overpressure risks under load.
Cross-Reference & Compatibility
Sister parts, same-platform variants, and known incompatibilities.
Technical Diagnostic & Service Protocols
Authoritative field procedures, diagnostic testing thresholds, and service SOPs for this assembly.